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Mantracourt Electronics Limited

T24 Technical Manual

26

T24-VA [0-10V Voltage Acquisition]

Overview

The T24-VA is a voltage acquisition module. This allows wireless remote viewing of voltage information using
2.4GHz radio.
The T24-VA acquires the voltage value (scales and linearises it to user defined specification) and periodically
transmits it. Between transmissions the device is optionally in a power saving sleep mode to conserve batteries.

Communications

To configure the device you will use the Read and Write mechanisms described in the

Data Packet Structures

section to read and write parameters and execute commands.

Parameter List

Parameter

Command

Number

Description

Native
Data
Type

Read /

Write

ID

3

Read the unique identifier ID for this device. (3 bytes)

BINARY 3
bytes

R

Version

53

Read the firmware version.

FLOAT

R

Channel

11

Radio Channel

UINT8

RW

EncKey

15

The radio encryption key to operate on. Requires
power cycle or Reset to enable.

Not supported in this

release.

BINARY
16 Bytes

RW

Power

12

Set or read the output power level. (0-100%)

UINT8

RW

Name

10

Set or read a user defined name. (11 characters)

STRING
11 Bytes

RW

Model

51

Read the model number of the device.

STRING
11 Bytes

R

WakeChkInt

16

Set or read the interval in milliseconds that a sleeping
device will wake to request a full wake from the base
station. (default 3000)

UINT16

RW

UseCSMA

18

Select whether to use

Carrier Sense Multiple Access

techniques on transmission

.

Value

Description

0

Disabled

The

Carrier Sense Multiple Access

will be

disabled.

NOT RECOMMENDED

1

Enabled

The

Carrier Sense Multiple Access

will be

enabled.

See

Unslotted CSMA/CA

in

Appendix A

UINT8

RW

BattLevel

69

The voltage measured on the battery.

FLOAT

R

BattLowLevel

110

Set or read the battery voltage at which the low
battery flag will be set in all received packets and in
the Status parameter).

FLOAT

RW

LowPowerMode

75

Defines power save mode.
0 = Awake all the time and transmit at TxInterval.
1 = Sleep. Wake at TXInterval, acquire value, transmit
value, sleep.

UINT8

RW

TxInterval

76

Time Interval between Transmissions. Set mS

INT32

RW

SampleTime

78

Set or read the SampleTime in milliseconds for
acquiring a reading at each TxInterval interval. The
larger the SampleTime the more accurate the reading
but at the expense of battery life. (Default 5)

UINT16

RW

SleepDelay

77

Time period before switching to low power sleep mode
if no StayAwake command or trigger received.
Setting to zero disables.

UINT16

RW

DataTag

119

Set or read the 2 byte Data Tag that is used when
transmitting the weight in a Data Provider Packet.
Note that default value is set to last 2 bytes of ID.

UINT16

RW

NumCalPoints

79

Number of calibration points required. Range 2 to 9

UINT8

RW

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Содержание T24-AO1

Страница 1: ...T24 Technical Manual Programming guide advanced documentation User Manual www mantracourt co uk...

Страница 2: ...To ID 9 Command 9 Write 9 Packet Type 9 To ID 9 Command 9 Data Type 9 Responses to Read and Write 10 ACK 10 Packet Type 10 From ID 10 RSSI 10 CV 10 Packet Type 11 From ID 11 Data Type 11 RSSI 11 CV 1...

Страница 3: ...ery Life 28 See Appendix B Acquisition Module Battery Life Non Strain Gauge Input 28 Antennas 28 T24 IA 4 20mA Current Acquisition 29 Overview 29 Communications 29 Parameter List 29 Data Provider Form...

Страница 4: ...der Simple 46 Overview 46 Communications 46 Parameter List 46 Power Supply 47 Installation 48 T24 HA Handheld Reader Advanced 49 Overview 49 Automatic Pairing 49 Manual Configuration 49 Available Mode...

Страница 5: ...79 Data Provider Control Interface DPCI Advanced 79 Manual Implementation 79 Example 80 Base Station Assisted 80 Examples 80 Cancelling 81 Appendix B 82 Radio Range 82 Example 1 82 Example 2 82 Examp...

Страница 6: ...acourt Electronics Limited T24 Technical Manual 5 CE 95 FCC 95 Industry Canada 95 OEM Reseller Marking and Documentation Requirements 96 FCC 96 IC 96 CE 96 Worldwide Regional Approvals 97 Important No...

Страница 7: ...s 1 Byte 1 Byte CRC calculated on this part Length refers to this section This Transport Packet is used to carry the Data Packets into and out of the target device via the base station Where Length by...

Страница 8: ...tion Error Bit indicated an error is present This is set and reset by the device which will include this information in the packet sent to the module LoBatt Bit indicated a low battery This is set and...

Страница 9: ...red By using a Data Tag we only need to change this tag on the replacement device and the rest of the system will work as required Status The bit values in this byte are used to indicate certain thing...

Страница 10: ...any supported data format to any other data format parameter but some formats are not very suitable i e You can write an INT32 formatted value to a parameter that is just a UINT8 but if the value exce...

Страница 11: ...Type From ID RSSI CV 07 00 00 00 00 00 Packet Type This is 0x7 hex 7 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that...

Страница 12: ...display as ASCII text 4 Binary unprintable Unprintable characters 5 Hex Best represented as hex 6 Bit Map 10110101 Each bit value should be shown 7 Percent Numeric or string value has a value 0 100 Da...

Страница 13: ...his packet is returned if the device has been written to and the data written is invalid Packet Type From ID RSSI CV 0A 00 00 00 00 00 Packet Type This is 0xA hex 10 decimal and may have higher bits s...

Страница 14: ...te device radio settings are configured to match the base station or if the base station is changed to match the remote device Both the Channel and the encryption key are matched once pairing has comp...

Страница 15: ...00 00 00 00 00 00 Packet Type This is 0x14 hex 20 decimal and may have higher bits set which indicate Error Low Battery and Broadcast From ID This contains the ID of the device that paired Data Tag Th...

Страница 16: ...ation is the only one connected to a particular serial port then every base station can have Address 1 as the PC will send packets to a particular port to select which base station handles a packet li...

Страница 17: ...ings control the baudrate for the serial interface Whether the serial interface is RS485 or RS232 is selected by switch position 8 5 6 7 Baudrate USB USB Off Off Off 9600 On Off Off 19200 Off On Off 3...

Страница 18: ...therefore we can only show the connections to the base station You must refer to the user manual regarding your RS485 connection to ascertain the correct connections PC PLC Connection Signal Directio...

Страница 19: ...es will need placing into a buffer and your software will need to detect and extract complete packets Outgoing data is written to report 0 and must always contain 64 bytes of data Any unused bytes sho...

Страница 20: ...IN bmAttributes 0x3 USB_ENDPOINT_TYPE_INTERRUPT wMaxPacketSize 0x40 bInterval 0x1 NOTE If you do not want to use the Mantracourt supplied communications DLL T24drv dll you may be interested in the fo...

Страница 21: ...ccess techniques on transmission Value Description 0 Disabled The Carrier Sense Multiple Access will be disabled NOT RECOMMENDED 1 Enabled The Carrier Sense Multiple Access will be enabled See Unslott...

Страница 22: ...sent itself to the other radios in a landscape aspect Specification Parameter Minimum Typical Maximum Units Notes T24 BSi External Supply voltage Range 9 12 32 Volts T24 BSi T24 BSu USB Supply Range 4...

Страница 23: ...device will wake to request a full wake from the base station default 3000 UINT16 RW UseCSMA 18 Select whether to use Carrier Sense Multiple Access techniques on transmission Value Description 0 Disa...

Страница 24: ...RW CalPointGain 97 The gain to apply to the input at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration point FLOAT RW CalPointOffset2 99 The offs...

Страница 25: ...Trigger 121 Enter Data Tag to watch for that will trigger pause mode UINT16 RW ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume mode UINT16 RW StayAwakeTrigger 122 Enter Data Tag...

Страница 26: ...Mantracourt Electronics Limited T24 Technical Manual 25 Installation Antennas See Appendix B Antenna Installation...

Страница 27: ...that a sleeping device will wake to request a full wake from the base station default 3000 UINT16 RW UseCSMA 18 Select whether to use Carrier Sense Multiple Access techniques on transmission Value Des...

Страница 28: ...at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration point FLOAT RW CalPointOffset2 99 The offset to apply to the input at this calibration point...

Страница 29: ...Enter Data Tag to watch for that will reset SleepDelay timer UINT16 RW DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay timer UINT16 RW NOTE All changes require a SAVE c...

Страница 30: ...that a sleeping device will wake to request a full wake from the base station default 3000 UINT16 RW UseCSMA 18 Select whether to use Carrier Sense Multiple Access techniques on transmission Value De...

Страница 31: ...at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibration point FLOAT RW CalPointOffset2 99 The offset to apply to the input at this calibration point...

Страница 32: ...ta Tag to watch for that will trigger resume mode UINT16 RW StayAwakeTrigger 122 Enter Data Tag to watch for that will reset SleepDelay timer UINT16 RW DoSystemZeroTrigger 125 Enter Data Tag to watch...

Страница 33: ...Mantracourt Electronics Limited T24 Technical Manual 32 Installation Antennas See Appendix B Antenna Installation...

Страница 34: ...d the output power level 0 100 UINT8 RW Name 10 Set or read a user defined name 11 characters STRING 11 Bytes RW Model 51 Read the model number of the device STRING 11 Bytes R WakeChkInt 16 Set or rea...

Страница 35: ...gger 121 Enter Data Tag to watch for that will trigger pause mode UINT16 RW ResumeTrigger 123 Enter Data Tag to watch for that will trigger resume mode UINT16 RW StayAwakeTrigger 122 Enter Data Tag to...

Страница 36: ...s Limited T24 Technical Manual 35 Measurement Resolution The noise free resolution is 15 5 bits 1 50 000 Power Supply See Appendix B Acquisition Module Power Supply Installation Antennas See Appendix...

Страница 37: ...R WakeChkInt 16 Set or read the interval in milliseconds that a sleeping device will wake to request a full wake from the base station default 3000 UINT16 RW UseCSMA 18 Select whether to use Carrier...

Страница 38: ...utput state Value Definition 0 Turn digital output off 1 Turn digital output on 2 Make digital output mirror the LED state V1 05 and later FLOAT RW Status 74 Live status where the bit values indicate...

Страница 39: ...ill reset SleepDelay timer UINT16 RW DoSystemZeroTrigger 125 Enter Data Tag to watch for that will reset SleepDelay timer UINT16 RW NOTE All changes require a SAVE command to enable them to survive th...

Страница 40: ...d a user defined name 11 characters STRING 11 Bytes RW Model 51 Read the model number of the device STRING 11 Bytes R WakeChkInt 16 Set or read the interval in milliseconds that a sleeping device will...

Страница 41: ...ly to the input at this calibration point FLOAT RW CalPointGain 97 The gain to apply to the input at this calibration point FLOAT RW CalPointOffset1 98 The offset to apply to the input at this calibra...

Страница 42: ...Tag to watch for that will trigger sleep mode UINT16 RW PauseTrigger 121 Enter Data Tag to watch for that will trigger pause mode UINT16 RW ResumeTrigger 123 Enter Data Tag to watch for that will tri...

Страница 43: ...Mantracourt Electronics Limited T24 Technical Manual 42 Battery Life See Appendix B Acquisition Module Battery Life Non Strain Gauge Input Installation Antennas See Appendix B Antenna Installation...

Страница 44: ...6 Set or read the interval in milliseconds that a sleeping device will wake to request a full wake from the base station default 3000 UINT16 RW UseCSMA 18 Select whether to use Carrier Sense Multiple...

Страница 45: ...annel and encryption keys if those have been changed and saved Command Save 55 Save any changes made to parameters Required before power cycling or issuing a Reset command Requires 500mS recovery time...

Страница 46: ...SampleTime SampleTime mS Noise Free Resolution Ratio 0 13 5 bits 1 13 000 9 14 bits 1 17 000 99 16 bits 1 62 000 999 17 bits 1 160 000 Power Supply See Appendix B Acquisition Module Power Supply Batt...

Страница 47: ...ing read by the device FLOAT R DisplayValue 61 The value being displayed by the device FLOAT R UseCSMA 18 Select whether to use Carrier Sense Multiple Access techniques on transmission Value Descripti...

Страница 48: ...tead of the value being displayed Overload will be displayed FLOAT RW ScaleInLo 75 Set or read a low input value at which you know what display you require Default 0 FLOAT RW ScaleInHi 77 Set or read...

Страница 49: ...Mantracourt Electronics Limited T24 Technical Manual 48 Installation There are no specific installation instructions...

Страница 50: ...econds If unsuccessful the display will show failed If successful the Data Tag and ID of the new device will have been configured within the handheld Depending on how the replacement device was config...

Страница 51: ...No effect unless held for 5 seconds to activate individual item view This can be disabled by setting NoNext parameter F1 If motion detection is activated then the reading must be steady to enable thi...

Страница 52: ...and the input value is within ZeroBand then the display will be zeroed The value of the input will be placed in AutoZero i e from this time onwards until powered off the display will show input value...

Страница 53: ...a to transmit when the F1 key is pressed Value Description 0 Always Gross The gross value will be transmitted even if the display shows a zeroed net reading 1 As Displayed The gross or net value will...

Страница 54: ...t 1 Used to wake the remote device when Wake key pressed in Items Mode BINARY 3 Bytes RW ValueDataTag7 87 Set or read the 2 byte Data Tag that is used to match a Data Provider packet to use as the inp...

Страница 55: ...ys if those have been changed and saved Command Save 55 Save any changes made to parameters Required before power cycling or issuing a Reset command Requires 500mS recovery time after executing Comman...

Страница 56: ...and Number Description Native Data Type Read Write ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 bytes R Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UIN...

Страница 57: ...75 Set or read a low input value at which you know what display you require Default 0 FLOAT RW ScaleInHi 77 Set or read a high input value at which you know what display you require Default 1 FLOAT R...

Страница 58: ...arrive from a device within the Timeoutx period then any reference to either the individual Vx tokens or one of the summing tokens will result in rather than a numeric value The actual serial output c...

Страница 59: ...the value used as input 3 which can be represented with the V3 token and is used in generating the result sum FLOAT RW Value4 63 Read or write the value used as input 4 which can be represented with t...

Страница 60: ...of the output value of V2 This is specified using zeros and a decimal point i e 000 0000 STRING 9 bytes RW Format3 112 Read or set the format of the output value of V3 This is specified using zeros a...

Страница 61: ...the serial output You can include text or tokens STRING 32 bytes RW Line4 72 Read or set the data for line 4 of the serial output You can include text or tokens STRING 32 bytes RW Line5 73 Read or se...

Страница 62: ...e number of digits to display the log number as UINT8 RW NVLog 149 Set or read whether to store the log number between power cycles As this writes to flash each time the LOG token is referenced it is...

Страница 63: ...d has been issued but no tare subtracted i e it will always contain the Gross value of the specified input 1 2345 RV1 RV8 Substitutes token with the last value received from the input This will NOT ha...

Страница 64: ...Parameter settings Line1 NET 0D FormatSUM 00 000 ValueDataTag1 C675 ValueDataTag2 FF34 PrintTrigger C675 MinInterval 100 LineDelay 0 PrintOnError 1 SwitchMode 1 Print Gross Sum of 2 Devices To Printer...

Страница 65: ...ABCD when the F1 button is pressed The printer is not very fast so we can only send a line every 50mS Also we do not want to print more often than once every 5 seconds even if the handheld tries to do...

Страница 66: ...ation SW1 Settings Switch positions 1 to 4 are not used Switch positions 5 to 7 control the baudrate for the serial interface Whether the serial interface is RS485 or RS232 is selected by switch posit...

Страница 67: ...e 4mA at 0 tonnes and 20mA at 8 tonnes Simply set the In Minimum to 0 and In Maximum to 8 Next you set the desired actions when errors occur Communications To configure the device you will use the Rea...

Страница 68: ...input value FLOAT R InMin 100 The input value at which the output will be at 0 FLOAT RW InMax 101 The input value at which the output will be at 100 FLOAT RW Timeout 102 The time allowed between data...

Страница 69: ...ad the system zero value which is subtracted from the value of the data arriving before mapping to the analog output FLOAT RW DoWake 110 Whether to wake paired module on power up 1 or 0 UINT8 RW Bound...

Страница 70: ...ches you will need to remove the cover from the case SW2 Switch Settings Range 1 2 3 4 5 6 7 8 0 10 V ON OFF OFF X X OFF ON OFF 10 V OFF OFF ON X X OFF ON ON 0 5 V ON ON OFF X X OFF OFF OFF 5 V ON OFF...

Страница 71: ...ative Data Type Read Write ID 3 Read the unique identifier ID for this device 3 bytes BINARY 3 bytes R Version 53 Read the firmware version FLOAT R Channel 11 Radio Channel UINT8 RW EncKey 15 The radi...

Страница 72: ...lowing table shows the decimal bit values and their meaning Bit Value Definition 1 STATUS_SHUNT_CAL 2 STATUS_INPUT_INTEGRITY 4 Reserved 8 Reserved 16 STATUS_POWER_UP 32 STATUS_BATT_LOW 64 STATUS_DIGIT...

Страница 73: ...Interval a Data Provider packet is transmitted that holds 1 value in FLOAT format See Appendix A Power Supply See Appendix B Acquisition Module Power Supply Battery Life See Appendix B Acquisition Mod...

Страница 74: ...Mantracourt Electronics Limited T24 Technical Manual 73 Installation Antennas See Appendix B Antenna Installation...

Страница 75: ...4 range of modules support PAIRING This is supported by the T24 Toolkit software and is also available through the documented radio protocol It is initiated by power supply removal and replacement so...

Страница 76: ...cause the module to return to deep sleep mode This ensures that the modules return to sleep even if communications is lost with the controller So we will look at an example scenario where an acquisiti...

Страница 77: ...TEREMOTE function specifying the command number 56 and use the specific module Data Tag COM Driver or Dot Net Assembly Function How To Data Provider Packets An event will be raised which lets you know...

Страница 78: ...f 4 bytes and is stored in 2 s compliment form The bytes are in order of significance MSB first MSByte LSByte 31 30 29 28 27 26 25 24 23 22 21 20 19 18 16 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Sign...

Страница 79: ...ion Mantracourt may also refer to Link Quality which is derived from the RSSI and CV values LQI 94 RSSI CV 55 2 3 9 Which gives an operational range of approximately 0 to 255 This operational range co...

Страница 80: ...ff period is selected from the wider range and the procedure repeated Certain packets are transmitted as if CSMA is disabled regardless of the device setting These include the sleep wake packets and r...

Страница 81: ...odule ID you can use the module Data Tag This will cause the base station to handle the sending of the command using the DPCI each time it sees an incoming Data Provider packet matching the Data Tag f...

Страница 82: ...ommand directed to an ID or broadcast ID of 0xFFFFFF and will work in conjunction with it for the WAKERDURATION period Cancelling To stop a previously sent command from lasting the full WAKERDURATION...

Страница 83: ...referred to as Free Space Path Loss and vary according to the wavelength of the signal At 2 4GHz Free Space Path Loss is given by Path Loss 32 4 20Log10 d Where Path Loss is expressed in dB d Path le...

Страница 84: ...der loss 1 5dB Enclosure Loss 6dB Sum of the gains GT GR or 4 5 6 0 10 5 Sum of the losses Feeder Loss Path Loss Enclosure Loss or 1 5 70 46 6 0 77 96 Signal strength at the receiver input is 10 5 77...

Страница 85: ...illustrated at Figure 3 Rad24i Tx GT 1dB Loadlink enclosure loss 0 2dB T24 BS Rad24e Rx GR 2 9dB Feeder loss 5 0dB Figure 3 Slant range 150metres GT Transmit antenna gain GR Receive antenna gain 3m o...

Страница 86: ...is vertical then the antenna is said to be vertically polarised and vice versa There are some exceptions to this such as crossed and circular polarisation but for the sake of simplicity they are not...

Страница 87: ...210 78 84 20 58 42 85 70 98 150 75 92 215 79 04 25 60 35 90 71 48 155 76 20 220 79 24 30 61 94 95 71 95 160 76 48 225 79 44 35 63 28 100 72 40 165 76 74 230 79 63 40 64 44 105 72 82 170 77 00 235 79 8...

Страница 88: ...is calculation uses the peak gain of the chip antenna stated as 3dBi in the manufacturers data sheet in practice this gain is rarely achieved being nearer to 1 to 1 5dBi RF Exposure Limits Power densi...

Страница 89: ...Mantracourt Electronics Limited T24 Technical Manual 88 7 mm 20 mm 20 mm...

Страница 90: ...t to a 3 Volt power supply or batteries WARNING This module is not reverse polarity protected WARNING The maximum voltage is 3 6V Battery Types Battery Type Notes Alkaline Zn MnO2 Pairs of alkaline 1...

Страница 91: ...ommend T24 PSSB module In line Battery Modules Capacitor Module T24 PSSA This is used for batteries which have an internal resistance of greater than 150mOhms overcoming voltage drops during high curr...

Страница 92: ...rom deep sleep to check whether it should wake up properly If the device wake check interval is set to 5 seconds then we can modify the battery life from above by multiplying by a factor of 0 6 We hav...

Страница 93: ...ing shows how to more accurately calculate battery life This does rely on an estimate of usable battery capacity which is not as high as manufacturers state their battery capacity to be except for bat...

Страница 94: ...U1 U2 U3 HoursUsage 24 If not in Low Power Mode AwakeCurrent FixedMeasurementCurrent HoursUsage 24 Calculate currents Now calculate sleep current SleepCurrent 30 WakeInt 0 008 SleepCurrent SleepCurren...

Страница 95: ...T24 Toolkit displays without any customisation The following example shows how to customise a T24 SA to make it appear to be a SGD 990 and have a description of SGD 990 Force Measurement Device This w...

Страница 96: ...C Norsk Dette utstyret er i samsvar med de grunnleggende krav og andre relevante bestemmelser i EU directiv 1999 5 EC Portugu s Este equipamento satisfaz os requisitos essenciais e outras provis es da...

Страница 97: ...Approved Antennas that have been tested by Mantracourt IC Labelling requirements for Industry Canada are similar to those of the FCC A clearly visible label on the outside of the final product enclosu...

Страница 98: ...me full responsibility for learning and meeting the required guidelines for each country in their distribution market For more information relating to European compliance of an OEM product incorporati...

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